基于IP架构的音视频系统信号交互测试  

Signal interaction test of audio and video system based on IP architecture

作　　者：杨奇 YANG Qi(China Centre Television,Beijing 100010,China)

机构地区：[1]中央电视台技术制作中心音频部

出　　处：《电声技术》2019年第12期69-72,80,共5页Audio Engineering

摘　　要：随着行业标准《高性能流化音频在IP网络上的互操作性规范》(GY/T304-2016)的颁布施行,吹响了全球电视音频行业向AoIP技术实践的号角。近几年来,中央广播电视总台音频部基于AoIP技术的工程项目不断涌现,随着音频系统、视频系统和通话系统均开始进行IP化实践,跨系统的信号交互调度的问题随之而来。笔者有幸参与了基于IP架构的音视频系统信号交互的测试工作,本文通过阐述音视频跨系统信号交互测试的设计思路和方案,对音频系统在上下游系统均为IP架构的时候,如何优化信号交互流程,更加合理安全地和视频系统、通话系统进行协同制作进行了探索。With the promulgation and implementation of the industry standard"high performance streaming audio interoperability specification on IP network"(GY/t304-2016),it has sounded the horn for global TV audio industry to practice AoIP technology.In recent years,AoIP-based engineering projects have been emerging in the audio department of China radio and television headquarters.With audio system,video system and talkback system all starting to carry out IP practice,the problem of cross-system signal interactive scheduling has emerged.The author had the opportunity to participate in the interaction of audio and video system based on IP architecture signal testing,this paper expounds the design of the audio video signal interaction across the system test ideas and plan,the audio system in both upstream and downstream system for IP architecture,how to optimize signal interaction process,safely and video systems,calls for more reasonable explores the collaborative production.

关 键 词：AOIP SMPTE 2110 边界时钟 三层组播路由 PTP精确时钟协议 NAT地址码转换 

分 类 号：TN919.8[电子电信—通信与信息系统]